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Master Lock 379DAT Universal Trailer Coupler Lock

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Master Lock 379DAT Universal Trailer Coupler Lock

(24 customer reviews)

List Price:	$29.31
Our Price:	$20.21
You Save:	$9.10 (31%)
Shipping:	Eligible for FREE Super Saver Shipping on orders over $25.
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SKU:

10745

In Stock

Availability: Usually ships in 1 business days

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Features

Employs an advanced locking mechanism
Features a rubberized plastic body
Keeps it rust free
Easy to install
Backed by a limited life time warranty

Description

Master Lock Universal Trailer Coupler Lock employs an advanced locking mechanism, manufactured to guard against trailer tow-away theft. This coupler lock features a rubberized plastic body and covered keyway which keeps it rust free. It is easy to install and is backed by a limited life time warranty.

Product Details

Product Length:	6.63 inches
Product Width:	7.56 inches
Product Height:	3.38 inches
Product Weight:	2.6 pounds
Package Length:	7.3 inches
Package Width:	6.1 inches
Package Height:	2.8 inches
Package Weight:	1.65 pounds
Average Customer Rating:	based on 24 reviews

Customer Reviews

Average Customer Review: 3.5

( 24 customer reviews )
Write an online review and share your thoughts with other customers.

Most Helpful Customer Reviews

10 of 10 found the following review helpful:

Works with Bulldog/Hammerblow couplers Feb 26, 2009 By Loren
I needed some locks for heavy-duty trailers that use 2-5/16" Bulldog couplers. I had previously had bad luck with Guardian locks, which were more expensive, not as well made, and not backed up by the manufacturer.

These Master Lock coupler locks not only appear to be much better locks, they come with a limited lifetime warranty from Master.

This lock fits the Bulldog/Hammerblow couplers and is a very reasonable price. Fortunately, I cannot say how well they resist thieves' attempts to steal the trailer, but they will certainly provide a substantial deterrent.

I bought mine in October 2008 and they did not have a rubberized coating nor a keyway cover. They have a chrome finish that appears to be excellent. Despite being in the weather all winter in Indiana, they still look and operate as if they were brand new.

Edit, 1 January 2012: I see that Amazon also sells Master Lock model 379ATPY. That lock appears to be closer to the model I bought back in October 2008. In spite of the listing on that item's page, it also fits 2-5/16" ball couplers, just as this one does.

I have since bought this exact model, the 379DAT, with the rubberized coating. It seems to be a bit looser on the coupler, I think because of the coating. Unless you are concerned about the possibility of the coupler's paint chipping from metal-to-metal contact, I would recommend the model 379ATPY over the 379DAT.

Both of these locks remain highly recommended.

5 of 5 found the following review helpful:

Picture is not what I received Mar 10, 2009 By D. Steele
Although the packaging says its a 379DAT, and looks somewhat a little different that what is pictured, what I received was the black rubberized version, not the chrome rubberized finsh as depicted. But, a Masterlock is a Masterlock. So if you're like me and just need a lock that's going to sit outside on your trailer anyway, then it doesn't really matter.

5 of 5 found the following review helpful:

Works without a hitch (pun intended) Nov 21, 2008 By Kay Hayes "knitting ninja"
Great peace of mind for an affordable price. Locked onto our 30 ft. trailer with no hassle. Looks like it would fit most anything. The polish finish is attractive and Amazon's price beat the heck out of our local RV dealer.

3 of 3 found the following review helpful:

Keep the honest people honest Mar 17, 2010 By K. Kjellquist
Lock is solid, heavy and appears to be well built. The action on the lock is smooth, and it's protected with a rubber cover. The lock fits fine on my ball hitch.

I must say a motivated thief could probably take care of this lock with a sledgehammer or pry bar, but as a basic lock it should be fine. If you are seriously concerned about your trailer, pair this product with another secondary lock.

2 of 2 found the following review helpful:

Works well, received as shown, weak key Feb 27, 2012 By D. Taylor "Tech Gadget User"
They have updated the picture and it does show the lock as I received it. It fits and locks my Haulmark trailer and boat trailer both without any issues, both have 2" balls. It serves it's designed purpose well. It gives me some peace of mind knowing that someone can't simply back up and drive off with our boat or cargo when we are on trips.

The unit feels fairly robust but sadly the keys are weak. I found if I wasn't careful the metal key bent when using it to get my setup installed and removed. To assure I didn't have a key break I made a copy and have been using the stronger copy key now. My particular key had a weaker spot due to a deep cut in the pattern of my lock so this may not be an issue for you.

See all 24 customer reviews on Amazon.com